Littlefoot befriends with a mysterious, fun-loving dolphin-like creature named Mo, who is trapped in "new water" caused by heavy rain. The gang then goes on an adventure to the "big water" to bring Mo home.
The Land Before Time IX: Journey to Big Water is a 2002 direct-to-video animated adventure musical film and the ninth film in The Land Before Time series. It was produced and directed by Charles Grosvenor. This is also the last film to use the soundtrack composed by James Horner. During the year this was released, Universal brought back on DVD, for the first time, two of the previous The Land Before Time films: The Great Valley Adventure and The Time of the Great Giving.